Question

Qual a derivada da função f(X) = x³cosx ?

Answer 1

$y = {x}^{3} \cos(x) \\ \frac{dy}{dx} = 3 {x}^{2} \cos(x) + {x}^{3} ( - \sin(x) ) \\ \frac{dy}{dx} = 3 {x}^{2} \cos(x) - {x}^{3} \sin(x)$